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From "Kevan Miller (JIRA)" <j...@apache.org>
Subject [jira] Created: (GERONIMO-4868) cglib ThreadLocal causing ClassLoader memory leak
Date Sun, 13 Sep 2009 15:55:57 GMT
cglib ThreadLocal causing ClassLoader memory leak
-------------------------------------------------

                 Key: GERONIMO-4868
                 URL: https://issues.apache.org/jira/browse/GERONIMO-4868
             Project: Geronimo
          Issue Type: Bug
      Security Level: public (Regular issues)
    Affects Versions: 2.1.4
            Reporter: Kevan Miller
            Assignee: Kevan Miller
             Fix For: 2.1.5, 2.2


ghostknife reported an OOME PermGen failure during a redeploy of an app. I took at the .hprof
file generated on an OOME when -XX:+HeapDumpOnOutOfMemoryError is set.

One leak is caused by the following:

{code}
Class Name                                                                               
                               | Shallow Heap | Retained Heap 
--------------------------------------------------------------------------------------------------------------------------------------------------------
org.apache.geronimo.kernel.config.MultiParentClassLoader @ 0xac80f258                    
                               |           96 |        13,896 
|- parent org.apache.geronimo.kernel.config.ChildrenConfigurationClassLoader @ 0xac80f470
                               |           72 |           720 
|  '- [1] java.lang.ClassLoader[10] @ 0xac813d18                                         
                               |           56 |           776 
|     '- parents org.apache.geronimo.kernel.config.MultiParentClassLoader @ 0xac812f88   
                               |           96 |         7,304 
|        '- <classloader> class org.apache.geronimo.management.geronimo.WebModule$$EnhancerByCGLIB$$aaa027b5
@ 0xb1bd48a8|          432 |         8,784 
|           '- proxyType org.apache.geronimo.kernel.basic.ProxyMethodInterceptor @ 0xac849258
                           |           24 |        46,904 
|              '- [0] net.sf.cglib.proxy.Callback[1] @ 0xac846ce8                        
                               |           16 |        46,920 
|                 '- value java.lang.ThreadLocal$ThreadLocalMap$Entry @ 0xac844080       
                               |           32 |        46,952 
|                    '- [8] java.lang.ThreadLocal$ThreadLocalMap$Entry[64] @ 0xac7c80b0  
                               |          272 |       106,984 
|                       '- table java.lang.ThreadLocal$ThreadLocalMap @ 0xac730ba8       
                               |           24 |       107,008 
|                          '- threadLocals java.lang.Thread @ 0xac726f80  DefaultThreadPool
1 Thread                     |           88 |       107,584 
--------------------------------------------------------------------------------------------------------------------------------------------------------
{code}

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